Borehole pressure relief technology is an effective way to reduce the elastic energy in the surrounding rock of deep roadways. thereby reducing the risk of regional rock bursts. To avoid large deformation of the roadway caused by pressure relief holes with large diameters and insufficient pressure relief with small pore diameters. this study proposes precise pressure relief holes with... https://www.markbroyard.com/hot-sale-nutribiotic-grapefruit-citrus-seed-extract-traveler-s-friend-30ml-for-sale-limited-super/